Roasting-furnace



(No Model.) 2 SheetsSheet 1 J. ROGER.

BOASTING FURNACE.

No. 542,715. Patented July 16, 1895.

UNITE STATES PATENT OFFICE.

JOHN ROGER, OF DENVER, COLORADO.

ROASTlNG -FURNACE.

' SPECIFICATION formingpart of Letters latent No. 542,715, dated July1c, 1895.

Application filed fieptemherz'l, 1894:: Serial No. 524,251. (No model.)

.To ntZZ whom it may concern.-

Be it known that 1, JOHN ROGER, a subject of the Queen of England,residing at Denver,

in the county of Arapahoe and State of 0010- rado, have invented certainnew and useful Improvements in Roasting-Furnaces; and I do declare thefollowing to be. a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

Myinvention has relation to roasting-furnaces, and among the objects inview is to provide a roasting-furnace which is provided with acooling-hearth 'over which the desulphurized ores are caused to passduring their progressive movement, whereby said ores will be cooled toenable the samev to be handled preparatory to any further treatment.

It has heretofore been necessary in order to cool the roasted ores totake the ore from the discharge-point of the furnace in a car anddischarge said ore over a cooling-floor and allow it to remain thereuntil sufiiciently cool to handle. Such operation necessitates more orless labor and makes the preparation of the ore for further treatment towhich it has to be subjected expensive, and my invention is designed toovercome the expense and disadvantage of said method of treatment.

With the various, objects in view my invention consists in the novelconstruction, arrangement, and combination of parts, as hereinafterfully described, illustrated in the drawings, and pointed out in theappended claims.

In the drawings, Figure l is a horizontal sectional view of aroasting-furnace of that class known as turret-furnaces, illustrating myinvention as applied thereto. Fig. 2 is a vertical central sectionalview thereof.

I would state that my invention is applicable to various classes offurnaces, and although I describe and show my invention in itsapplication to aturretfurnace-that is to say, a furnace constructed incircular form, such as has been patented by R. Pearce on December 27,1892-yet I do not wish to be restricted in the application of myimprovements to that particular style of furnace.

The principle of my invention consists in utilizing a portion or sectionof the usual roasting-hearth as a cooling-hearth for the ores, saidcooling-hearth being adapted to be cooled in any desired manner and byany suitable means. For instance, it might be cooled by means ofcold-air currents or watersprays, or the hearth or bottom portion may bemade of iron, with a water-jacket beneath the same, whereby to absorbthe heat. It will therefore be understood that although I 6: show butone arrangement of means for attaining the desired result-21 e., ahearth constructed of cast-iron waterjackets1 intend in practice toemploy other means foraccomplishing my object without departing from theprinciple of my invention and Without losing any of its advantages.

A indicates a portion of a turret-furnace such as has heretofore beenreferred to, and B its roasting-hearth, along which the ore is caused totravel by the usual revolving stirrer, agitator, or rabble-blades O,mounted upon radial arinsD, which are adapted to be revolved by anydesired means.

A portion of the hearth B, preferably adjacent to the discharge openingor hopper E thereof, I reserve for my cooling-hearth, as indicated at F,which section or cooling-hearth is adapted to be separated or out offfrom the remaining portion of the roasting-hearth by 8: swinging doors GH, which are adapted to normally hang vertically and cut off the hotgases from the cooling-hearth, and said doors being also adapted toyield to allow for the passage of the agitator or rabble-blades beforementioned. I

The cooling-hearth may, as before stated, be constructed and providedwith means to effect the cooling of the ores, and as an illustration Ishow said cooling-hearth as being water-jacketed, as at I, to which coldwatermay be fed through water-pipes K.

Suitable air-inlet openings L may be arranged to admit cold air to thecooling-hearth, and I also provide a stack M, adjacent to the 5 swingingdoor G, for the purpose of carrying off the gases which are evolved'fromthe ore after passing the roasting-hearth, and also to create a currentof cold air over the coolinghearth, so as to absorb or carry away agreat Ico amount of heat.

It will be obvious that by my invention ores may be more quickly andconveniently handled and at a minimum of expense, and it hearth,revolving agitator or rabble blades,

swinging doors arranged to divide a portion of said hearth from theremaining portion and to thereby form a cooling section, said doorsbeing adapted to normally hang vertically and to swing upwardly topermit of the a passage of the said blades, and means for cooling saidsection as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN ROGER. Witnesses:

MARY A. WHEE ER, JAMES HENDERSON.

